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Pharmacological therapies for IBS-C are designed to alleviate abdominal discomfort and enhance bowel function. In patients with IBS-C, fiber supplements may help soften stools and decrease straining, but may also lead to increased gas production and bloating. Osmotic laxatives like milk of magnesia are frequently used to soften stools and increase stool frequency in IBS-C patients. In addition, two drugs approved for use in severe IBS-C adult cases are linaclotide (Linzess) and lubiprostone...
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While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?
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Confounding in statistical epidemiology represents a pivotal challenge, referring to the distortion in the perceived relationship between an exposure and an outcome due to the presence of a third variable, known as a confounder. This variable is associated with both the exposure and the outcome but is not a direct link in their causal chain. Its presence can lead to erroneous interpretations of the exposure's effect, either exaggerating or underestimating the true association. This...
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The associations between modifiable risk factors and constipation: a comprehensive mendelian randomization study.

Hong Chang1,2,3, Jing Ouyang1,2,3, Meng Tian1,2,3

  • 1Lanzhou University, Lanzhou, China.

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Summary

This study used Mendelian randomization to identify genetic risk factors for constipation. Gastroesophageal reflux disease, atorvastatin use, and hypothyroidism were associated with increased constipation risk.

Keywords:
ConstipationGenome-wide association dataMendelian randomizationRisk factors

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Area of Science:

  • Genetics
  • Epidemiology
  • Gastroenterology

Background:

  • Constipation is a common condition with significant public health implications.
  • Early identification of modifiable risk factors is essential for effective prevention strategies.
  • Genetic approaches can help elucidate causal relationships between risk factors and diseases.

Purpose of the Study:

  • To systematically investigate the causal relationship between genetically predicted modifiable risk factors and constipation.
  • To identify potential targets for constipation prevention through genetic analysis.

Main Methods:

  • Employed the inverse variance weighting (IVW) method as the primary analytical approach.
  • Utilized multivariate Mendelian randomization (MVMR) to adjust for potential biases.
  • Performed sensitivity analyses including MR-Egger intercept, Cochran's Q test, and leave-one-out analysis.
  • Applied Bonferroni correction to control for false positive rates.

Main Results:

  • A significant causal association was found between genetically predicted gastroesophageal reflux disease (GERD) and constipation (OR=1.192).
  • Atorvastatin use (OR=16.995) and hypothyroidism (OR=2.299) showed significant associations with increased constipation risk.
  • Potential causal associations were also observed for education level, major depressive disorder, and aspirin use.

Conclusions:

  • Identified several genetically predicted risk factors, including GERD, atorvastatin use, and hypothyroidism, associated with constipation.
  • These findings offer valuable insights for developing targeted public health policies and prevention strategies for constipation.